patch 9.1.0375: tests: 1-second delay after Test_BufEnter_botline()

Problem:  tests: 1-second delay after Test_BufEnter_botline()
          (after v9.1.0374)
Solution: Wipe the created buffers (zeertzjq).

closes: #14647

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 6745ecb..24e1daf 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -4687,6 +4687,9 @@
   edit Xxx2
   au BufEnter Xxx1 call assert_true(line('w$') > 1)
   edit Xxx1
+
+  bwipe! Xxx1
+  bwipe! Xxx2
   au! BufEnter Xxx1
   set hidden&vim
 endfunc
diff --git a/src/version.c b/src/version.c
index 2bd0667..c000e59 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    375,
+/**/
     374,
 /**/
     373,